System of splash lubrication.



A effin 665e s E 2 A. P. BRUSH.

SYSTEM 0F SPLASH LUBRIUATION.

APPLICATION vFILED PEB. 15, 1911.

1,041,735. Patented-0015.221912.

4/5/ 6 H 'r l Y l fn v Yinventan cumin sauras rganr orrrcn ALAivsoN r.BRUSH, or FLINT, MICHIGAN.

.To all whom it may concern:

Be it known that I, ALANsoN P. BRUSH, a

citizen of the United States, residing at Flint, in the county ofGenesee and State of Michigan, have invented a certain new and L usefulImprovement in Systems of Splash Lubrication, of which the `following isa full, clear, and exact description.

In my prior Reissue Patent No. '12,524

there is shown and described means for satisfactorily producing splashlubrication of the cylinders of a multi-cylinder internal combustionengine. This construction has y been put on many motor cars and hasproved l5: itself to be satisfactory' and efficient; but

tprior to the origination of the invention l which forms the subjectmatter of this patent, the said prior invention has been applied only toengines whose crank cases have 2Q a removable lower' part which isseparable from the upper part in a plane which intersects the bearingsof the crank shaft.

The present invention is an improvement on that which is shown in saidprior patent.

It was particularly contrived to adapt the said 'splash lubricationsystem to use in connectlon with engines whose crank cases do notseparate in aplanc which intersects the4 l crank shaft bearings;although the invention may also be used with such crank cases as do soseparate in a plane which intersects -the crank bearings. y

The invention consists of a crank case the crank shaft bearing, andanupper part, (which may be made of one .or more than 'one fpiece) in.which the crank shaft is journaled,said` upper 'partv having along one40,7(and preferably both) of sides a plurality of forwardlyanddownwardly inclined trough's,and the removable lower part having'aplurality of oil pits into which sai-d troughs respectively discharge.5- 'Ihe invention ,in its more'specific form includes alsoV the peculiarshape ofthe oil pits, bas shown in the drawing, and hereinafterldescribed; in the inclined transversely extended :shelves whichoverhang the oilpits,

wardly-inclined return channelfor return: V'ingthenil.from thefront'part of thecrank case to the ,.oil'pit at the rear' end of .said.crank shaft; and .n various othen specific 5,5 features vofconstruction; allfof which will i Specification of Letters Patent.'Application filed February 15, 1911. Serial No. 608,665.

and B the removable bottom section Patented Oct. 22, 1912.

and defined by the ent invention is embodied, a part of the wall of saidcrank case being broken away. Fig. 2 is a plan view of the removablebottom section of the crank case. tudinal sectional side view of saidbottom section. Fig. 4 is a transverse sectional view of the crank caseacross oneof the rear pits thereonfor example, in the plane of line 4-4on Fig. 1. Fig. tional View across the front oil the plane of line 5-5on Fig. 1.

Referring to the parts by letters, A represents the upper section of thecrank case, thereof. C represents the crank shaft which has four cranksc, and which is journaled in bearings in the ends of the upper sectionwholly above the removable bottom section.

D represents a connecting rod which is in engagement with one of thecranks; and E represents 'a curved oiling ltube which is screwed intothe lower cap d of said connecting rod in communication with 4a hole pitand in Fig. 3 is a longi through sai'd cap leading to theel-ank bear.

` ing. This oiling tube is not new at the present time, and is not anabsolute essential to the invention, although it does help i'n cans fingthe circulation of the oil in the crank Y having' a removable lower partwhich is sep q 35' arable from the upper part in a plane below case, aswill be described.

The crank case shown is such as is adapted for a four-cylinder engine.The bottom casing section B has four oil pits 6,6252, bis.' On

the side walls of the upper crankl case section A above the removablebottom section are inclined troughs a. These troughs .may be, andpreferably are on both sides, but are of most service when on that sidetoward which the crank pin swingsvin moving through the jlower half ofits path. There are three troughs a on each side, one arranged over andadjacent to each of the three rear oil pits, so as to be capable ofcatchingfthe oil splashed froml each of the three rear cranks and the4parts associated therewith, onto the side 50 and the `open topped'downwardlyandrear-` walls of the' casing member A; and each ofIthesetroughs delivers the oil which it catches b4 formed within the-lower casing section andy extending across' the same from side to side,each shelf being rigid with and extended rearwardly and upwardly fromthe juncture of the dividing walls between two adjacent pits andoverhangi/ng the rear pocket of the two. The oil which runs downward outof the troughs will drop onto these several shelves and will thereby becaused to flow into the next pit ahead. The

,front oil pit does not have associated with it one of the inclinedtroughs referred to. Instead there is a pocket a along o ne andpreferably both side walls of the caslng section A each pocket being open at top and v serve to cover and close the top of said longitudinallyextended channels b5. Near its front end each channel b5 is providedwith a lateral oil set be which is directly beneath the pocket a. l

In automobile construction the engine is set so that the crank shaftinclines from its frontI end to its rear end downward a little. This isshown in Fig.'1 in which the front end is at the right side of thefigure. Now, in the operation of the engine the oil tubes E willdip intothe oil in the several oil pits and thereby oil will be splashed aroundin the crank case and some will be thrown against the side walls of thecasing. Additionally the oil tubes E will, as they plunge into the oilbecome filled with the same; and as they rise and leave the oil pools inthe pits the oil will for most part run out and be delivered againstthat side wall of the section A toward which said tubes move in sorising. The oil so thrown against the walls ofthe section A will rundown into the associated troughs a and will be delivered therefrom ontothe shelves band thence into the next pits ahead; and thereby this oi'lwill be gradually carried forward. When it reaches the front pit and issplashed therefrom, it will run into the pocket, thence into the offsetpart b of the longitudinally 'extended channel b5 in which it will iowby gravity rearward into the rear pocket. It will be noted that the rearwalls bl of these oil pits are pretty nearly vertical and that the frontwalls bs are inclined considerably forward and upward; and that theshelves t4 overhang these inclined walls bs of the pits. This particularconstructionV is of advantage because, 1f the automoblle 1s going uphill, the rear end of the crank case becomes more than usually depressedrelative to thefront end. This will change the level of the oil in thepits; but, in fact, it raises a the oil level in the pockets relativetothe planes in which the lower ends of theitube E sw-ing, and therebythese tubes will dipl deeper int-o the oil and will throw more oil intothe casing walls. This is as it should be because in going up hill moreoil should be splashed because the engine requires more. In going downhill, it is the front end of the crank casing which is depressed, andthe oil will run forward and its depth will be decreased relative to theoil tube E, and this is as it should be because thereby less oilwill besplashed, and less oil is required under these conditions.I Theoverhanging shelves b4, however, prevent the oil from running from onepocket to the other, however much the crank-case may be tipped, asstated, under any conditions in practical use.

Having descrlbed my invention, I, claim:

l.' In a multiple cylinder engine provided with a plurality of cranks,the 'combination of a crank case, and a crank shaft mountedtherein,-said crank case having a bottom section which is removable in ayplane below the crank shaft bearing, and is formed withoil pits locatedone below each crank, and an oil return channel which is located in itsupper edge in t-he plane of separation of the two casing members andhas` an open front lend adjacent t-o the front pit and extends therefromto a point where it may be discharged into the rear pit, and the upperpart of said crank case having on the side wall, toward which the cranksmove when in their lowest positions, inclined troughs which are loca-tedone over 'each of the oil pits except the front one and are arranged todischarge into the its next ahead of those over which they are ocated.

2. In amultiple cylinder engine provided' with a plurality of cranks,`the combination of a crank case having a removable bottom section whichis separable from the part above it in a plane below the crank shaftbearings, and has oil pits located. one below each crank, there being insaid lower section transversely extended shelves which extend rearwardlyand upwardly from the places where the walls of the adjacent pits. are`joined and partly overhang the oil pits be hind them. l 3. In a multiplecylinder engine, provided with a plurality of cranks, a crank casehaving a removable bottom section which is separable from the part aboveit in a plane below' the crank shaft'bearings, and has a plurality ofoil v,pits located one below each crank, and has along one edge alongitudinally extended open topped trough provided with a lateraloffset near the front end, the upper part of said crank case havingalong one lower side edge an inwardly extended -flangewhich, when theparts are connected together, covers 'said oil channel, excepting theoffset partthereof, said upper member having on its sides above all ofthe oil pits except' the front. one downwardly and forwardlyinclinedtroughs which severally discharge into the pits next ahead of thoseabove which they are located, and said side also having 5above the frontpit an open topped pocket whoselower end is in open' communication withthe offset part of said oil channel.

,4. In a multiple cylinder engine provided with a plurality of cranks,acrank case in which the crank shaft is mounted, which crank case has aremovable bottoni sectionwliich is separable lfrom the lpart above it ina plane below thecrank shaft bearings, said bottomsection having aplurality of oil pits located respectively'below the severa-l cranks,the rear Vwall of each oil pit being approximat-ely vert-ical andthefront wall of said oil pit being inclined morenearly toward ahorizontal position.

5. In a' multiple cylinder engine provided i with a plurality of cranks,a crank case in which thevcrank shaft is mounted, which vlocatedrespectively below the several cranks,

the rear wall of each oil it being approximately vertical and the ontwall of said oil it being inclined more'nearly toward a horizontalposition, and Adownwardly and forwardly inclined shelves' extending fromone side of the lowerl crank case 4section to the other side andconnected at their'front ends with the juncture's of thefront and rearWalls of adjoinin its andfext'ending rearward and upwardg rom thesepoints of connection so asv to overhang the pits behind them.

1`n testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

' ALANSON P. BRUSH.

Witnesses:

0. V. vH. NACKER, E. L. THnRs'roN.

